Ioannis
| Name | Ioannis |
| Type | Steamer
|
| GRT | 3,828 tons |
| Country |  Greek |
| Built | 1902
|
| Builder | W. Gray & Co., Ltd., West Hartlepool
|
| Operator | C. Mazarakis (N. D. Lykiardopulo), Argostoli
|
| History |
|
U-boat attacks on Steamer Ioannis
| Date | U-boat | Loss type | Position | Location | Route | Cargo | Casualties |
| 1 | 12 Nov 1916 | U 50 (Gerhard Berger) | Sunk | 150 miles N of Cape Finisterre or 130 miles N of Cape Ortegal
| 45° 30'N, 7° 20'W
| Bahia Blanca - London
| wheat
|
|
Position of attack on Ioannis
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